package com.baosaas.api.baseInfo.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

public class httpUtil {
	/**
	 * 向指定URL发送GET方法的请求
	 * 
	 * @param url
	 *            发送请求的URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return URL 所代表远程资源的响应结果
	 */
	public static String sendGet(String url, String param) {
		String result = "";
		BufferedReader in = null;
		try {
			String urlNameString = url + "?" + param;
			URL realUrl = new URL(urlNameString);
			// 打开和URL之间的连接
			URLConnection connection = realUrl.openConnection();
			// 设置通用的请求属性
			connection.setRequestProperty("accept", "*/*");
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("user-agent",
					"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 建立实际的连接
			connection.connect();
			// 获取所有响应头字段
			Map<String, List<String>> map = connection.getHeaderFields();
			// 遍历所有的响应头字段
			for (String key : map.keySet()) {
				System.out.println(key + "--->" + map.get(key));
			}
			// 定义 BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(
					connection.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("发送GET请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输入流
		finally {
			try {
				if (in != null) {
					in.close();
				}
			} catch (Exception e2) {
				e2.printStackTrace();
			}
		}
		return result;
	}

	/**
     * 向指定 URL 发送POST方法的请求
     * 
     * @param url
     *            发送请求的 URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream(),"UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！"+e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return result;
    }    

	
//    public static void appadd(String ADD_URL,String obj) {
//
//        try {
//             //创建连接
//            URL url = new URL(ADD_URL);
//             HttpURLConnection connection = (HttpURLConnection) url
//                     .openConnection();
//             connection.setDoOutput(true);
//             connection.setDoInput(true);
//             connection.setRequestMethod("POST");
//             connection.setUseCaches(false);
//             connection.setInstanceFollowRedirects(true);
//             connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
//
//            connection.connect();
//
//            //POST请求
//            DataOutputStream out = new DataOutputStream(
//                     connection.getOutputStream());
//
//
//            out.write(obj.getBytes("UTF-8"));
//             out.flush();
//             out.close();
//
//            //读取响应
//            BufferedReader reader = new BufferedReader(new InputStreamReader(
//                     connection.getInputStream()));
//             String lines;
//             StringBuffer sb = new StringBuffer("");
//             while ((lines = reader.readLine()) != null) {
//                 lines = new String(lines.getBytes(), "utf-8");
//                 sb.append(lines);
//             }
//             System.out.println(sb);
//             reader.close();
//             // 断开连接
//            connection.disconnect();
//         } catch (MalformedURLException e) {
//             // TODO Auto-generated catch block
//             e.printStackTrace();
//         } catch (UnsupportedEncodingException e) {
//             // TODO Auto-generated catch block
//             e.printStackTrace();
//         } catch (IOException e) {
//             // TODO Auto-generated catch block
//             e.printStackTrace();
//         }
//
//    }

	
//	public static void main(String[] args) throws UnsupportedEncodingException {
//		httpUtil snCal = new httpUtil();
//		String param="name=yanghong&yanghong=yanghong";
//		snCal.sendPost("http://127.0.0.1:8081/oyys-seed-web/evaluate/staticGrade", param);
//	
//	}

	// 对Map内所有value作utf8编码，拼接返回结果
	public String toQueryString(Map<?, ?> data)
			throws UnsupportedEncodingException {
		StringBuffer queryString = new StringBuffer();
		for (Entry<?, ?> pair : data.entrySet()) {
			queryString.append(pair.getKey() + "=");
			queryString.append(URLEncoder.encode((String) pair.getValue(),
					"UTF-8") + "&");
		}
		if (queryString.length() > 0) {
			queryString.deleteCharAt(queryString.length() - 1);
		}
		return queryString.toString();
	}

	// 来自stackoverflow的MD5计算方法，调用了MessageDigest库函数，并把byte数组结果转换成16进制
	public String MD5(String md5) {
		try {
			java.security.MessageDigest md = java.security.MessageDigest
					.getInstance("MD5");
			byte[] array = md.digest(md5.getBytes());
			StringBuffer sb = new StringBuffer();
			for (int i = 0; i < array.length; ++i) {
				sb.append(Integer.toHexString((array[i] & 0xFF) | 0x100)
						.substring(1, 3));
			}
			return sb.toString();
		} catch (java.security.NoSuchAlgorithmException e) {
		}
		return null;
	}

}
